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I have a 6 spd that started vibrating in overdrive returning from vacation this summer. It has gotten louder, but has seemed to be the same lately. It can be noticed in other gears, but is very pronounced in OD. Coincidentally, it started about 500 miles after I had the clutchchanged (2 days before leaving on vacation). The shop left the 2 bolts loose on the swing bearing, 1 fell out, and allowed my driveshaft to whip all the way over to the exhaust. I pulled over and replaced the bolt, and all was well for 400 miles or so until the vibration in overdrive started.
The driveshaft turns true, and I don't see any problems there. I also had the four bolts that bolt the driveshaft to the tranny come loose last month, 1 fell out.
The shop claims it is in the tranny, and they're not responsible. The shop originally put a Zoom variable torqueclutch in, but it made a knocking noise when you let the clutch out, even in neutral. I would not take it like that, so they replaced the Zoom with a stock clutch, and it quieted down.
If you hold pressure on the shift lever, you can almost make the noise go away, but this can't be good. Any ideas short of pulling it out and going through it?
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